One of the best things about solar panels is that they require very little maintenance. There are no moving parts, no fluids to top up, and no filters to change. However, a small amount of regular care will keep your system generating at maximum efficiency and help you spot any issues before they become expensive problems. Here is everything Manchester homeowners need to know about maintaining their solar investment.
Cleaning: How Often and How to Do It
In most of Greater Manchester, rain does a reasonable job of keeping panels clean. But over time, dust, pollen, bird droppings, and lichen can build up, particularly on shallow-pitched roofs where water runs off more slowly. We recommend a professional clean every 12-18 months for most properties. If you live near trees or in an area with heavy traffic pollution, every 6-12 months is better. DIY cleaning is possible using a long-handled soft brush and deionised water from a hose — never use abrasive materials or high-pressure washers, which can damage the panel surface.
Monitoring: Your First Line of Defence
Most modern inverters come with monitoring apps that let you track daily, monthly, and yearly generation. Checking your app once a week takes 30 seconds and helps you notice unusual drops in output. If your system usually generates 12 kWh on a sunny April day but suddenly produces 3 kWh, something is wrong. Common causes include inverter faults, shading from new vegetation, or soiling. Early detection saves money because a non-generating inverter wastes days or weeks of production.
- Visual inspection (DIY): Check for debris, damage, or shading changes every 3 months
- Professional clean: Every 12-18 months depending on location
- Annual health check: Electrical connections, inverter performance, mounting integrity
- Inverter monitoring: Check app weekly for generation anomalies
- Pest proofing: Inspect for bird nesting under panels annually
When to Call a Professional
Some tasks should always be left to MCS certified professionals. Any work on the electrical system, inverter replacement, or roof penetration needs a qualified installer. If you notice physical damage to panels, water ingress into the inverter, or persistent underperformance that cleaning does not fix, book a professional inspection. Our maintenance plans across Manchester include annual site visits, panel cleaning, inverter health checks, and full system reporting. It is the easiest way to protect your investment and ensure your warranty remains valid.
One of our Prestwich customers noticed a 20% drop in generation via their monitoring app. Our inspection found a loose DC connection caused by thermal expansion. A 10-minute fix restored full output. Without monitoring, that fault could have cost them £200 in lost generation before they noticed.